Tenchi Academy, an all-girls boarding school, is renowned not only for its academic excellence but also for training the nation's premier sword fighters. Students enrolled in the special "Sword Bearer" program participate in a school-wide tournament called the Star Stealing, aiming to secure both wealth and renown. Kurogane Hayate enters the scene. As her sister Nagi recovers from a persistent injury, the energetic and cheerful Hayate must attend the Academy in her stead until Nagi is fit to return. Upon discovering that her former orphanage, the Dandelion Garden, owes a massive debt to Yakuza loan sharks, Hayate resolves to become a sword-bearer and win the Star Stealing. However, there is one issue... she requires a partner to compete, and the one girl Hayate has set her sights on has no interest in associating with her!